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A Static Instability Detecting Scheme for Distance Protection
Author(s): 
Pages: 53-56
Year: Issue:  7
Journal: Automation of Electric Power Systems

Keyword:  距离保护振荡闭锁静态稳定破坏检测判据;
Abstract: 传统的线路保护静态稳定破坏检测需要人工对特定定值进行整定,并且当振荡中心在线路之外时可能无法检测出振荡.而在这种工况下再发生故障时,距离保护动作行为将会不正确,同样需要振荡闭锁.文中分析了静态稳定破坏检测判据的原理及存在的问题,提出一种利用Ucos及其变化率来检测系统是否失去静态稳定的判据,该判据不依赖于整定,不受振荡中心位置影响.仿真结果表明,利用此判据两侧保护均能快速、可靠地判出振荡,从而可以...
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